20002001022 has 24 divisors (see below), whose sum is σ = 43931338464. Its totient is φ = 6575999904.

The previous prime is 20002001021. The next prime is 20002001027. The reversal of 20002001022 is 22010020002.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a junction number, because it is equal to n+sod(n) for n = 20002000995 and 20002001013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20002001021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7609798 + ... + 7612425.

It is an arithmetic number, because the mean of its divisors is an integer number (1830472436).

Almost surely, 2^20002001022 is an apocalyptic number.

20002001022 is an abundant number, since it is smaller than the sum of its proper divisors (23929337442).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

20002001022 is a wasteful number, since it uses less digits than its factorization.

20002001022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15222304 (or 15222301 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

Adding to 20002001022 its reverse (22010020002), we get a palindrome (42012021024).

The spelling of 20002001022 in words is "twenty billion, two million, one thousand, twenty-two".